Hi,
A particular example of a table where this is happening is defined as
CREATE TABLE [Drilling Wells and TD] ([WellCode] INTEGER ,[StartYear] TEXT ,[StartMonthYear] TEXT ,[Htactualtd_Wellcode] INTEGER ,[Seqno] INTEGER ,[Starttime] DATETIME ,[Endtime] DATETIME ,[Duration] DOUBLE ,[Startmd] DOUBLE ,[Endmd] DOUBLE ,[Classcode] TEXT ,[Opscode] TEXT ,[Majoroperation] TEXT ,[Phase] TEXT ,[Troubletype] TEXT ,[Cumulativedur] DOUBLE ,[CompanyCode1] TEXT ,[CompanyCode2] TEXT ,[CompanyCode3] TEXT ,[CompanyCode4] TEXT ,[CompanyCode5] TEXT ,[RunnCost] DOUBLE ,[MilestoneNo] INTEGER ,[MilestoneDesc] TEXT ,[WELL_Wellcode] INTEGER ,[Wellname] TEXT ,[Wellfield] TEXT ,[Latdeg] INTEGER ,[Latmin] INTEGER ,[Latsec] DOUBLE ,[Longdeg] INTEGER ,[Longmin] INTEGER ,[Longsec] DOUBLE ,[Rkbtowellhead] DOUBLE ,[Waterdepth] DOUBLE ,[Startdate] DATETIME ,[Spuddate] DATETIME ,[Tddate] DATETIME ,[Mdtotal] DOUBLE ,[Tvdtotal] DOUBLE ,[Totdrilled] DOUBLE ,[X_PK_] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT );